Monument Beach – current water temperature and swimming conditions

Water Temperature in Monument Beach: Daily Trends, Historical Records, and Forecast

⚠️ This is cool water that may feel brisk on entry. Swimming is usually limited to short sessions, and prolonged stays can become uncomfortable without thermal protection. Many swimmers choose a wetsuit, especially for surfing or open-water swimming.

It’s important to note that these swimming tips and recommendations apply only in settled weather. When air temperatures drop below 20°C — and sometimes even below 25°C — swimming can feel uncomfortable, even when water temperatures are relatively high.

Water Temperature Over the Last 30 Days

While water temperatures in Monument Beach declined overall during the past month, they have shown a noticeable rebound over the last week.

According to our forecast, Sea water temperature in Monument Beach will be 17.6°C in the next 7 days. See the table below for daily data for the upcoming week.

Table of Daily Sea Temperature Data

Annual Water Temperature Overview by Month

Monthly Water Temp Ranges

30°C

25°C

20°C

15°C

10°c

5°C

0°C

Annual Water Temperature Trend

Monument Beach sits on the South Coast of New South Wales, facing the open Tasman Sea, and water temperatures here follow the familiar seasonal pattern of this part of the coast. In summer, the ocean generally warms to around 21–24 °C, which is comfortable for swimming and spending time in the water on warm days. Autumn often stays mild, with temperatures commonly between 19–22 °C, while spring is cooler at roughly 17–20 °C as the sea slowly warms after winter. During winter, water temperatures usually drop to about 16–18 °C, which can feel cold without a wetsuit, particularly when winds pick up.